胰腺实性假乳头状瘤的临床特点及预后分析

目的 探讨胰腺实性假乳头状瘤(SPT)的临床病理和免疫组化特征、组织起源、生物学行为及临床治疗方法 和预后.方法 对18例SPT组织标本进行HE染色和免疫组化SP法染色,收集患者的临床资料,并对患者进行随访.结果 18例SPT患者中,女性16例,男性2例,发病年龄9～65岁,平均25.3岁.多以腹痛和上腹部包块为主要症状.肿瘤常有包膜,囊实相间,镜下可见肿瘤由假乳头和囊实性区混合组成,瘤细胞围绕纤维血管轴心形成特征性假乳头结构.免疫组化检测结果 显示,多数肿瘤表达α-抗胰蛋白酶(α-AT)、α-抗糜蛋白酶(α-ACT)和波形蛋白(Vim),阳性率均为94.4%.18例SPT患者全部获得随访,随访时间3个月至10年不等,5例术后复发,均予手术切除.18例SPT患者中,死亡4例,中位生存时间为23.0个月,5年生存率为72.2%.患者年龄、肿瘤大小、SPT特殊的病理表现、大血管侵犯和肿瘤转移与胰腺SPT患者生存期有关.结论 SPT为一种低度恶性肿瘤,可能起源于胰腺多潜能干细胞.好发于青少年女性,有独特的临床病理表现,手术切除后预后好.

Clinical features and prognosis of solid-pseudopapillary tumor of the pancreas

Objective To study the clinicopathological and immunohistochemical features, histogenesis and biological behavior, clinical treatment and pronosis of solid pseudopapillary tumor of the pancreas ( SPT). Methods Routine HE and immunohistochemical (SP) stainings were used in the pathological examination of 18 cases of SPT. Their clinical data were retrospectively analyzed. All the 18 postoperative patients were followed-up for 3 months to 10 years with an average of 29.2 months.Results There were 16 females and 2 males, age ranging from 9 to 65 years with mean age of 25.3 years. Abdominal pain and palpable mass were among the major complains. Tumors were encapsulated and mixed with solid and cystic tissues. Histological features were pseudopapillary structure with a fibrovascular core. Immunhistologically, most tumors were positive for α-AT, α-ACT and Vim, with a high percentage of 94.4%. The eighteen cases were followed-up from 3 to 120 months. Five cases received reoperation after recurence, and 14 cases were alive. Maximum survival time was 121 months and the minimum survival time was 3 months, with a median survival time of 23.0 months. The 5-year survival rate was 72.2%. A Kaplan-Meier analysis revealed that patient's age,tumor size, pathologic features, metastasis were major prognostic factors for SPT. Conclusion SPT is a tumor of low-grade malignancy and may be derived from multipotent stem cells. SPT most frequently affects young female, and has distinct clinicopathologic manifestation with excellent prognosis after surgical treatment.